python - ttk.Entry.select_range() 适用于 Button，但不适用于 python/tkinter 中的 ttk.Button？

Question

有人可以解释一下为什么entry.select_range()适用于Button，但不适用于ttk.Button吗？

from tkinter import *
from tkinter import ttk

root = Tk()

entry = ttk.Entry(root)
entry.pack()

#This works
button = Button(root, text="Select your text", command=lambda:
                    entry.select_range(0, END))

#but this doesn't
##button = ttk.Button(root, text="Select your text", command=lambda:
##                    entry.select_range(0, END))

button.pack()

root.mainloop()

Answer 1

这个答案来自Google Group说，

However, on Windows (only) the selection will only become visible when the entry gets the focus.

还有此页面关于ttk button说，

By default, a ttk.Button will be included in focus traversal ... To remove the widget from focus traversal, use takefocus=False

所以你需要为ttk.Button添加takefocus选项。

button = ttk.Button(root, takefocus=False, text=...)